As if transforming philosophical debate into a high-stakes drama wasn't enough theatrical alchemy, Cormac McCarthy’s riveting two-hander, “The Sunset Limited,” at Ventura’s Rubicon Theatre eloquently frames the age-old faith versus reason conflict in crisp, resonant terms that shun familiar clichéd arguments — this is no country for old stereotypes. In a squalid Harlem tenement, a suicidal, atheistic college professor (Joe Spano) squares off against the ex-con-turned-preacher (Tucker Smallwood) who rescued him from leaping into the path of the poetically named subway train referenced in the play’s title. Reprising his role from the terrific...